Nut-lock.



A. SACK.

nu Lock. K Amwmon man JULY 1.1m.

Zal/fazit 'myn 770mm' Patented my 6,1919.

BEL SACK, 0F GLENDIVE, MONTANA.

NUT-Loox.

Specification of Letters Patent Patented May 6, 1919.

Application led July 1, 1918. Serial No. 242,775.

To all whom it may concern.'

Be it known that I, ABEL SACK, a citizen of tlie United States, residing at Glendive, countv of. Dawson, and State of Montana, have `invented ceitain new and useful Improvements in Nut-Locks, of which the fol lowing is a specification.

rl`his invention relates to improvements 1n .'nut locks and has as its special object the provision of means whereby a nut` is pre-A vented from unscrewing or unloosening from the bolt or part with which it 1s engaged.

A further object is to provide a nut lock, inexpensive in construction and which may be readily applied without changes 1n the bolt and in which the nut is not changed 1n its appearance.

rIhese and other'like obJects are attained bv the novel construction and combination oli parts hereinafter described and shown in the accompanying drawing, forming a material part of this specication and in whichzy Figure 1 is a side elevational view, showing the application of the invention, parts being broken away in order to disclose the construction.

Fig. 2 is a perspective view, showing the other side of thewasher.

Fig. 4 is a perspective view showing a modified form of lock washer.

Fig. 5 is a sectional view, taken on line 5 5 of Fig. 4.

Fig. 6 is a perspective view, showing an ordinary nut having a recess, in its bottom, and

Fig. 7 is a similar perspective view, showing the inner surface of the recess, yformed with ratchet like teeth.

In Fig. 1, an ordinary form of bolt 1s shown with a plain round stem orshank 10 washer is a pair of opposed prongs 26 formed by piercing and pressing the metal so that one end of the prongs are left attached to the material from which the washer is made.

These prongs are formed with sharply defined angular edges 27, bent outwardly from the same side of the washers and so shaped as to be received within the recess 20 of the nut, contacting against the bottom of the recess and offering material resistance against its unscrewing.

In order to prevent the washers themselves from turning with respect to the parts with which the are engaged, indentations 28 are made on one side, these indentations forming sharply' pointed spurs 29 on the other side of the washer, adapted to engage with the parts clamped by the nut, so as to retain the washer against rotation.

Inktlie modiied` form shown in Figs. 4 and 5, in addition to the prongs 26, another pair of opposed prongs 30 are pressed outwardly from the washer, taking the place of the spurs 29, formed by the indentation 28, and it will! be obvious that two of the washers may be placed side by side in alinenient so that should the spurs become worn, broken, or otherwise damaged, the washers may be reversed in position, practically renewing the sharp edges which make contact l with the nut and' spectively.

Fig. 7, shows a modified nut containing a plurality of ratchet shaped teeth 32, with which the prongs 26 are directly engageable, thereby positively preventing the nut from turning relatively to the washer.

It is to be understood that the material of .the washer is of a resilient nature and yet capable of maintaining the prongs extended part to be clamped re4 rigidly outward, so as to act in an eifeetive manner.

The construction and operation of the device is believed to be evident from the foregoing, taken in connection with the drawing, while its use and application is of an obvious nature.

Having thus described my invention what I claim yas new, and desire to secure by LettersPatent is In a nut lock, the combination with a threaded bolt and a nut suited thereto, of.

circular wasliers-fitted to the shank of said bolt, a pair of opposed prongs having sharply defined edges bent outwardly from the same side of the washers the center parts of said prongs being integral with said recess formed in the base of said nut, and washers,land 'a pair of said washers placed ratchet teeth formed in the bottom of said side by side and in alinement, and a second recess engugeable with the other pair of 10` pair of opposed prongs also pressed out-l prongs formed with said Washer. Wardly from the Washers, one pair of said In testimony whereof I have aiixed my prongs beingl adapted` to engage with the signature.

part; to be clamped on one side, an annular o ABEL SACK. 

